Optical Disc Reproducing Apparatus, In-Vehicle Optical Disc Reproducing Apparatus, In-Vehicle Optical Disc Reproducing System, and Optical Disc Reproducing Method

Abstract

An in-vehicle optical disc reproducing apparatus according to the present invention reads disc specific information from an optical disc, and inputs vehicle specific information from an IC card, or the like. Next, the in-vehicle optical disc reproducing apparatus creates an encryption key from the disc specific information and the vehicle specific information, and then uses the created encryption key to encrypt content stored on the optical disc before the encrypted content is stored in a HDD. During the above process, if shaking of a vehicle is detected, the processing of storing the encrypted content to the HDD is stopped. When the encrypted content is reproduced, the disc specific information is checked. Only when an original disc is inserted, the encrypted content is decrypted by use of the stored encryption key to generate the original content so that the original content can be reproduced. As a result, the in-vehicle optical disc reproducing apparatus can permit only an authorized user to stably reproduce the content with the copyright of the content protected.

1 . An optical disc reproducing apparatus for reproducing content stored on an optical disc having disc specific information used to identify the optical disc, said optical disc reproducing apparatus comprising:
 means for reading the disc specific information of the optical disc;   means for inputting environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   means for creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus;   means for encrypting first content stored on the optical disc by use of the encryption key to generate second content;   means for storing the second content in an auxiliary storage device;   means for decrypting the second content stored in the auxiliary storage device by use of the encryption key to generate the first content;   means for judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   means for, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption.   
   
   
       2 . An in-vehicle optical disc reproducing apparatus placed in a mobile object for reproducing content stored on an optical disc having disc specific information for identifying the optical disc, said in-vehicle optical disc reproducing apparatus comprising:
 means for reading the disc specific information of the optical disc;   means for inputting vehicle specific information of the mobile object;   means for creating an encryption key from the disc specific information and the vehicle specific information;   means for encrypting first content stored on the optical disc by use of the encryption key to generate second content;   means for storing the second content in an auxiliary storage device;   means for decrypting the second content stored in the auxiliary storage device by use of the encryption key to generate the first content;   means for judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   means for, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption.   
   
   
       3 . The in-vehicle optical disc reproducing apparatus according to  claim 2 , wherein:
 said mobile object includes means for detecting vibrations of the mobile object; and   when the means for detecting vibrations detects vibrations of the mobile object, said means for storing the second content in the auxiliary storage device interrupts the processing of storing the second content.   
   
   
       4 . An optical disc reproducing system for reproducing, by an optical disc reproducing apparatus, content stored on an optical disc having disc specific information used to identify the optical disc, said optical disc reproducing system further including a content copying apparatus, wherein:
 said content copying apparatus includes:   means for reading the disc specific information of the optical disc;   means for inputting environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   means for creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus;   means for encrypting first content stored on the optical disc by use of the encryption key to generate second content; and   means for outputting the second content to a portable storage medium;   said optical disc reproducing apparatus includes:   means for reading the disc specific information of the optical disc;   means for inputting environmental information of the optical disc reproducing apparatus;   means for creating an encryption key from the disc specific information and the environmental information; and   means for inputting the second content from the portable storage medium; and   said optical disc reproducing apparatus further includes:   means for decrypting the second content inputted from the portable storage medium by use of the encryption key to generate the first content;   means for judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   means for, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption.   
   
   
       5 . An in-vehicle optical disc reproducing system for reproducing content associated with an optical disc having disc specific information, said in-vehicle optical disc reproducing system including: an in-vehicle optical disc reproducing apparatus placed in a mobile object; and a content delivery server for delivering content to the in-vehicle optical disc reproducing apparatus, said content delivery server being connected to the in-vehicle optical disc reproducing apparatus by wireless communications, wherein:
 said in-vehicle optical disc reproducing apparatus includes:   means for reading the disc specific information of the optical disc;   means for inputting vehicle specific information of the mobile object;   means for creating an encryption key from the disc specific information and the vehicle specific information;   means for transmitting the disc specific information to the content delivery server by the wireless communications;   means for receiving first content from the content delivery server by the wireless communications;   means for encrypting the first content received from the content delivery server by use of the encryption key to generate second content;   means for storing the second content in an auxiliary storage device;   means for decrypting the second content stored in the auxiliary storage device by use of the encryption key to generate the first content;   means for judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   means for, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption; and   said content delivery server includes means for transmitting, to the in-vehicle optical disc reproducing apparatus, the first content associated with the disc specific information received from the in-vehicle optical disc reproducing apparatus.   
   
   
       6 . The in-vehicle optical disc reproducing system according to  claim 5 , wherein:
 said mobile object includes means for detecting vibrations of the mobile object; and   when the means for detecting vibrations detects vibrations of the mobile object, said means for storing the second content in the auxiliary storage device interrupts the processing of storing the second content.   
   
   
       7 . The in-vehicle optical disc reproducing system according to  claim 5 , wherein:
 said in-vehicle optical disc reproducing apparatus further includes means for further transmitting the vehicle specific information to the content delivery server; and   said content delivery server includes means for transmitting, to the in-vehicle optical disc reproducing apparatus, the first content associated with the disc specific information and the vehicle specific information that have been received from the in-vehicle optical disc reproducing apparatus.   
   
   
       8 . An optical disc reproducing system for reproducing content associated with an optical disc having disc specific information used to identify the optical disc, said optical disc reproducing system including: an optical disc reproducing apparatus; a content delivery server for delivering content to the optical disc reproducing apparatus, said content delivery server being connected to the optical disc reproducing apparatus through a network; and a content copying apparatus, wherein:
 said content copying apparatus includes:   means for reading the disc specific information of the optical disc;   means for inputting environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   means for creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus;   means for transmitting the disc specific information to the content delivery server through the network;   means for receiving first content from the content delivery server through the network;   means for encrypting the first content stored on the optical disc by use of the encryption key to generate second content; and   means for outputting the second content to a portable storage medium;   said optical disc reproducing apparatus includes:   means for reading the disc specific information of the optical disc;   means for inputting environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   means for creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus; and   means for inputting the second content from the portable storage medium;   said optical disc reproducing apparatus further includes:   means for decrypting the second content inputted from the portable storage medium by use of the encryption key to generate the first content;   means for judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   means for, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption; and   said content delivery server includes means for transmitting, to the optical disc reproducing apparatus, the first content associated with the disc specific information received from the optical disc reproducing apparatus.   
   
   
       9 . An optical disc reproducing method for reproducing, by an optical disc reproducing apparatus, content stored on an optical disc having disc specific information used to identify the optical disc,
 said optical disc reproducing apparatus including: a CPU; a main storage unit; and a control unit for carrying out control by executing a program stored in the main storage unit, said optical disc reproducing method comprising the steps of:   according to an instruction from the control unit, reading the disc specific information of the optical disc;   according to an instruction from the control unit, reading environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   according to an instruction from the control unit, creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus;   according to an instruction from the control unit, encrypting first content stored on the optical disc by use of the encryption key to generate second content;   according to an instruction from the control unit, storing the second content in an auxiliary storage device;   according to an instruction from the control unit, decrypting the second content stored in the auxiliary storage device by use of the encryption key to generate the first content;   according to an instruction from the control unit, judging whether or not an optical disc is inserted, and judging whether or not disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   according to an instruction from the control unit, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption.   
   
   
       10 . An optical disc reproducing method for reproducing, by an in-vehicle optical disc reproducing apparatus placed in a mobile object, content stored on an optical disc having disc specific information used to identify the optical disc,
 said in-vehicle optical disc reproducing apparatus including: a CPU; a main storage unit; and a control unit for carrying out control by executing a program stored in the main storage unit,   
     said optical disc reproducing method comprising the steps of:
 according to an instruction from the control unit, reading the disc specific information of the optical disc; 
 according to an instruction from the control unit, reading vehicle specific information of the mobile object; 
 according to an instruction from the control unit, creating an encryption key from the disc specific information and the vehicle specific information; 
 according to an instruction from the control unit, encrypting first content stored on the optical disc by use of the encryption key to generate second content; 
 according to an instruction from the control unit, storing the second content in an auxiliary storage device; 
 according to an instruction from the control unit, decrypting the second content stored in the auxiliary storage device by use of the encryption key to generate the first content; 
 according to an instruction from the control unit, judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and 
 according to an instruction from the control unit, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption. 
 
   
   
       11 . The optical disc reproducing method according to  claim 10 , wherein
 if the control unit is notified that vibrations have occurred in the mobile object, the control unit stops the step of storing the second content in the auxiliary storage device.   
   
   
       12 . An optical disc reproducing method for reproducing, by an optical disc reproducing apparatus, content stored on an optical disc having disc specific information used to identify the optical disc, said optical disc reproducing method using a content copying apparatus,
 said content copying apparatus including: a CPU; a main storage unit; and a control unit for carrying out control by executing a program stored in the main storage unit,   said optical disc reproducing apparatus including: a CPU; a main storage unit; and a control unit for carrying out control by executing a program stored in the main storage unit,   said optical disc reproducing method comprising the steps of:   according to an instruction from the control unit of the content copying apparatus, reading the disc specific information of the optical disc;   according to an instruction from the control unit of the content copying apparatus, reading environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   according to an instruction from the control unit of the content copying apparatus, creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus;   according to an instruction from the control unit of the content copying apparatus, encrypting first content stored on the optical disc by use of the encryption key to generate second content;   according to an instruction from the control unit of the content copying apparatus, outputting the second content to a portable storage medium;   according to an instruction from the control unit of the optical disc reproducing apparatus, reading the disc specific information of the optical disc;   according to an instruction from the control unit of the optical disc reproducing apparatus, reading environmental information about a position at which the optical disc reproducing apparatus is placed, or specific information of the optical disc reproducing apparatus;   according to an instruction from the control unit of the optical disc reproducing apparatus, creating an encryption key from the disc specific information in combination with the environmental information about a position at which the optical disc reproducing apparatus is placed, or in combination with the specific information of the optical disc reproducing apparatus;   according to an instruction from the control unit of the optical disc reproducing apparatus, reading the second content from the portable storage medium;   according to an instruction from the control unit of the optical disc reproducing apparatus, decrypting the second content inputted from the portable storage medium by use of the encryption key to generate the first content;   according to an instruction from the control unit of the optical disc reproducing apparatus, judging whether or not disc specific information of an inserted optical disc coincides with the disc specific information used when the encryption key has been created; and   according to an instruction from the control unit of the optical disc reproducing apparatus, if it is judged that the disc specific information of the inserted optical disc coincides with the disc specific information used when the encryption key has been created, reproducing the first content generated by the decryption.